cc65/libsrc/apple2/allow_lowercase.s
Oliver Schmidt feb5026823
Added option to disable the force-to-uppercase behavior of the apple2 target. (#2474)
* Added option to disable the force-to-uppercase behavior of the apple2 target.

* Fixed dangling spaces.
2024-08-07 18:27:09 +02:00

24 lines
514 B
ArmAsm

;
; Oliver Schmidt, 2024-08-06
;
; unsigned char __fastcall__ allow_lowercase (unsigned char onoff);
;
.export _allow_lowercase
.import uppercasemask, return0, return1
_allow_lowercase:
tax
lda values,x
ldx uppercasemask
sta uppercasemask
cpx #$FF
beq :+
jmp return0
: jmp return1
.rodata
values: .byte $DF ; Force uppercase
.byte $FF ; Keep lowercase